820-00165 no VCORE

[ajdoc]

Board had small liquid damaged repair long time ago on backlight circuit (fuse and LED driver has been replaced).
No new liquid damage/corrosion visible.

Magsafe LED - on
Fan spin = yes
Chime = no
Image = no
Backlight = no
USB LED = yes
Caps Lock LED = no

PPBUS_G3H - 8.60V
PPBUS_S5_HS_COMPUTING_ISNS - 8.58V
PPBUS_S5_HS_OTHER_ISNS - 8.59V
PP3V42_G3H - 3.43V
PPVRTC_G3H - 3.34V
PP5V_S5 - 5.12V
PP5V_S4RS3 - 5.12V
PP5V_S0 - 5.10V
PP3V3_S5 - 3.34V
PP3V3_S4 - 3.32V
PP3V3_SUS - 3.34V
PP3V3_S3 - 3.34V
PP3V3_S0 - 3.33V
PP3V3_S4SW_SNS - 3.34V
PP1V8_S3 - 1.78V
PP1V2_S3 - 1.20V
PP1V05_SUS - 1.03V
PP1V5_S0 - 1.50V
PP1V05_S0 - 1.03V

PPVCC_S0_CPU - 0.00V
Resistance - 10.1 Ohm
Diode mode - 0.006V

ALL_SYS_PWRGD - 3.42V

Any idea?

 

[2informaticos]

Missing CPU core voltage can be caused by various causes.
You should check for corroded resistors and traces first.
Check VCCST_PWRGD presence.
Heat PCH area with quality flux.
Also try known good BIOS.